If the Sun is your DaraKaraka, then your spouse will have solar qualities of steadfastness and dependability. They will be steady in their emotions unless your Sun Darakaraka is conjunct Rahu or the Moon.
More than anything, the Sun wants to follow its inspiration and achieve something great on its chosen path. With Sun as your DaraKaraka, you can expect a spouse who is dedicated to their path. You yourself desire a spouse who has leadership abilities and follows their inspiration. You want someone who can be a source of light to you and provide a steady/solid foundation. If the Sun is well placed in your chart with positive aspects, your spouse will have these good qualities. However, if your Sun is quite damaged then you’ll see more of a domineering and egotistical attitude.
The Sun represents a spouse who holds a high position in their field or is well-known. As the planet that rules the sign of Leo and the 5th house, your spouse will either have a significant planet placed in their 5th house, or have Leo as a part of their makeup. The Sun itself can be your Spouse’s most powerful planet – perhaps exalted, on their ascendant, or their AtmaKaraka.
Check the Sign and House your Sun DaraKaraka is placed in
Aside from the solar qualities that the Sun Darakara bestows on the spouse, you must look at the rasi sign and bhava that your DaraKaraka is in. The sign and house placement offers more specific information about the spouse.
For example, if your Darakaraka is in the 7th house, then your future husband or wife is very relationship oriented or you will have a business together. They will either have a strong Venusian influence or perhaps Venus is their AtmaKaraka. Whatever house your DaraKaraka is in, expect that house to be important in your spouses’ chart – they will have planets there, like Sun, Moon, or their Atmakaraka. If you know the meaning of the bhavas (houses), and the characteristics of each sign, then combine that information with the qualities of Sun. When you look at all those details, you get a good picture of the personality of your spouse.